I just installed UltraISO on an AMD system running Win7 x64 Pro and I'm having the exact same issue with burning.I installed both trial versions 32 and 64bit of PowerISO and have no problems burning images with their software..UltraISO is a 32bit program and running on a 64bit OS I think is where the problem lies dealing with the SATA AHCI.But how do you fix this... Any help would be greatly appreciated.

I tried to make a Hiren's boot cd with UltraISO on a blank DVD... but it doesn't work. áThe software that comes with windows... isoburn.exe WORKS, PowerISO also works but UltraISO and Nero Burner Rom 32bit both fail to burn on a 64bit OS.